[Ekida]

Well, today i decided to clean some dust from my PC
With a vaccum cleaner
I used it before cleaning and was working fine. After cleaning
I made sure i didnt forget to plug anything.

But now my PC its shutting down by itself. What is happening?

[Jimmie]

Clean it again and make sure you didn't unplug a fan it's probably over heating.

[Ekida]

Clean it again and make sure you didn't unplug a fan it's probably over heating.

I didnt unplug anything
I left everything as it was before

It was working fine before i cleaned it

[EliteTM]

Wait, what kind of vacuum cleaner? Like your typical household vacuum? It could be possible you fried some of your PC components since typical household vacuums build up static pressure which is deadly for PC components.

[Bouzazi]

Did you unplug the CPU from the motherboard? If yes. Did you apply a new Thermal paste on it? Your CPU will overheat and auto shuts down at 80° (varies..) if you didn't.

[5chn4pp]

Make sure your motherboard is getting power, basically check every connection from your powersupply and make sure they are fully plugged in.

[datguy.dev]

You should explain in more detail how the computer is shutting down. Is it crashing without warning or doing a normal shutdown?

Start search reliability monitor. You may save the report and share it or post a screen capture.

[coffeefiend]

There are two real possibilities here: The first is, like EliteTM stated, static electricity build up on the nozzle of the vacuum could have fried something. More likely, you may have unintentionally bumped a connection with the nozzle and left it partially disconnected. You should thoroughly check all connections, even if you say you have already. Hopefully it's nothing serious.

[Pluxo]

Well the first issue that anyone would instantly notice if they were somewhat good with computers, is you don't use a vacuum cleaner. Static build up. You should have done some research before you cleaned something that has expensive parts.